Rear view BF 120
21.4 Corrective Action
Exchange the soft-key rows.
VDU
soft keys
Replace the fan.
Fan
Replace the front panel with cover glass.
Front glass
Replace the complete visual display unit.
Monitor
If you have found that the VDU interface on the control is defective (connector X49, X149),
Control
replace the MC. -->See "Exchange of HEIDENHAIN Components" on page 28 – 523.
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HEIDENHAIN Service Manual iTNC 530